string=input()

wrong_answer=0
easy_numbers=[101, 103, 107, 109, 113, 127, 131, 137, 139, 149, 151, 157, 163, 167, 173, 179, 181, 191, 193, 197, 199, 211, 223, 227, 229, 233, 239, 241, 251, 257, 263, 269, 271, 277, 281, 283, 293, 307, 311, 313, 317, 331, 337, 347, 349, 353, 359, 367, 373, 379, 383, 389, 397, 401, 409, 419, 421, 431, 433, 439, 443, 449, 457, 461, 463, 467, 479, 487, 491, 499, 503, 509, 521, 523, 541, 547, 557, 563, 569, 571, 577, 587, 593, 599, 601, 607, 613, 617, 619, 631, 641, 643, 647, 653, 659, 661, 673, 677, 683, 691, 701, 709, 719, 727, 733, 739, 743, 751, 757, 761, 769, 773, 787, 797, 809, 811, 821, 823, 827, 829, 839, 853, 857, 859, 863, 877, 881, 883, 887, 907, 911, 919, 929, 937, 941, 947, 953, 967, 971, 977, 983, 991, 997]
finall_number=0
number=0

massive=string.split(' ')
replace_string=string.replace(' ','')
bull=replace_string.isalpha()
first_zero=string.startswith('zero')

if len(massive)>3 or len(massive)<3:
    wrong_answer=1
else:
    if bull==False or first_zero==True:
        wrong_answer=1
    else:
        zero=replace_string.replace('zero','0')
        one=zero.replace('one','1')
        two=one.replace('two','2')
        three=two.replace('three','3')
        four=three.replace('four','4')  
        five=four.replace('five','5')
        six=five.replace('six','6')
        seven=six.replace('seven','7')
        eight=seven.replace('eight','8')
        nine=eight.replace('nine','9')       

if nine.isdigit()==True:
     number=int(nine)
else:
    wrong_answer=1

if number<100 or number>999:
    wrong_answer=1
    
finall_number = min(easy_numbers, key=lambda x: abs(x-number))

if wrong_answer==1 :
    print('Wrong input')
else:
    print(finall_number)